virtualenvwrapper tips and tricks

I’ve seen a few people talking about how they use virtualenvwrapper
on twitter, including some links to customizations like these aliases
from Holger Krekel.

If you have some tips of your own, I’d appreciate a link in the
comments here. Once I have a few collected, I’ll pull together some of
the interesting ones and add them to the documentation.

So, how do you use virtualenvwrapper?